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European Heart Journal 1993 14(7):958-963;
Copyright © 1993 by the European Society of Cardiology.
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© 1993 The European Society of Cardiology

Time course of left ventricular function and coronary patency after saruplase vs streptokinase in acute myocardial infarction

J. SCHOFER, M. LINS, D. G. MATHEY, F. H. SHEEHAN* and THE PRIMI TRIAL STUDY GROUP

Kardiologie — Interventionelle Kardiologie, Hamburg, Federal Republic of Germany
*The Cardiovascular Research and Training Center, University of Washington Seattle, Washington, U.S.A.

Received 14 August 1991; revised 8 February 1993; .

Correspondence: Joachim Schofer, MD. Kardiologie — Interventionelle Kardiologie, Othmarscher Kirchenweg 168, 2000 Hamburg 50, Germany

Abstract

As part of a prospective randomized double-blind trial (PRIMI) to study the early patency rate of the infarct-related artery after saruplase (INN for recombinant unglycosylated full-length human single-chain urokinase-type plasminogen activator) vs streptokinase in a subgroup of patients, left ventricular function was compared between both treatment groups at 90 min and 24 h after thrombolysis and at discharge, and ventricular function was related to the coronary perfusion grade.

Despite a higher patency rate in the saruplase group 60 min after initiating thrombolysis, neither global ejection fraction nor hypokinesia at the infarct site were significantly different between the treatment groups at any of the three time points when function was measured. Hypokinesia at the infarct site remained almost equally severe throughout the study in patients with perfusion grade O, I, and II, and was consistently significantly milder in patients with perfusion grade III. In contrast, in patients with perfusion grade II there was a significant drop in hyperkinesia at the opposite wall at 24 h after thrombolysis and before discharge despite unchanged wall motion at the infarct site.

Although patients treated with saruplase had a higher patency rate in the infarct related vessel shortly after the start of thrombolysis, no difference was found in left ventricular function compared to patients treated with streptokinase. Complete reperfusion (TIMI grade III) seems to be a prerequisite for left ventricular function recovery after thrombolysis, whereas only an occluded vessel (TIMI grade O and I) seems to be related to a longer lasting hyperkinesia at the opposite wall.

Key Words: Saruplase • acute myocardial infarction • ventricular function


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